PDF Compressor
📦 PDF Compressor Source Code $4.99
Get the complete, ready‑to‑deploy HTML file with all styling and logic. This is the exact code powering the demo above — no dependencies, works offline, and 100% client‑side. Uses pdf‑lib to re‑encode embedded images at lower quality and optimize PDF structure. Perfect for developers who need to shrink PDFs without sending sensitive documents to third‑party servers. One‑time purchase, lifetime access.
What Is a PDF Compressor?
A PDF compressor reduces the file size of PDF documents by optimizing embedded resources and re‑encoding images. This is essential for meeting email attachment limits, improving page load times, and reducing storage costs. PDFs often become large because they contain high‑resolution images, embedded fonts, and redundant data. This tool re‑encodes embedded images at lower quality settings and compresses the document structure — all without uploading your files anywhere. For typical documents with embedded images, you can expect a 40‑70% reduction in file size.[reference:0]
How to Use
- Upload a PDF using the file picker — any PDF up to ~50MB works.
- Choose a compression level — Light (minimal reduction), Medium (balanced), or High (maximum compression).
- Click "Compress PDF" — the tool processes the file and shows the result.
- Download the compressed PDF with the Download button.
Frequently Asked Questions
How does the compression work?
The tool re‑encodes embedded images at lower quality using the Canvas API and optimizes the PDF's internal structure. Image re‑encoding is where 80‑90% of the compression gain comes from.[reference:1] The compression level controls the image quality: Light uses 85% quality, Medium uses 70%, and High uses 50%.
Is my data uploaded to a server?
No. All processing happens entirely in your browser using pdf‑lib and the Canvas API. Your documents never leave your device.[reference:2][reference:3]
What kind of size reduction can I expect?
For documents with embedded images, you can typically achieve 40‑70% reduction.[reference:4] Text‑only PDFs may see less reduction since the compression primarily targets images.
Disclaimer: This tool performs all operations locally in your browser. No data is stored, transmitted, or logged. You are responsible for ensuring you have the rights to process any documents you upload.